EP0128430B1 - Machine pour aiguiser les lames de patins à glace - Google Patents

Machine pour aiguiser les lames de patins à glace Download PDF

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Publication number
EP0128430B1
EP0128430B1 EP19840105970 EP84105970A EP0128430B1 EP 0128430 B1 EP0128430 B1 EP 0128430B1 EP 19840105970 EP19840105970 EP 19840105970 EP 84105970 A EP84105970 A EP 84105970A EP 0128430 B1 EP0128430 B1 EP 0128430B1
Authority
EP
European Patent Office
Prior art keywords
blade
wheel
skate
edge
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19840105970
Other languages
German (de)
English (en)
Other versions
EP0128430A2 (fr
EP0128430A3 (en
Inventor
Joseph Alexander Consay
Douglas Ronald Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universal Skate Sharpeners Ltd
Original Assignee
Universal Skate Sharpeners Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CA000430108A external-priority patent/CA1210935A/fr
Priority claimed from CA000430117A external-priority patent/CA1208023A/fr
Application filed by Universal Skate Sharpeners Ltd filed Critical Universal Skate Sharpeners Ltd
Priority to AT84105970T priority Critical patent/ATE36461T1/de
Publication of EP0128430A2 publication Critical patent/EP0128430A2/fr
Publication of EP0128430A3 publication Critical patent/EP0128430A3/en
Application granted granted Critical
Publication of EP0128430B1 publication Critical patent/EP0128430B1/fr
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C3/00—Accessories for skates
    • A63C3/10—Auxiliary devices for sharpening blades

Definitions

  • the present invention relates to a machine for sharpening the blades of ice skates.
  • the present invention has the general objective of providing improvements in this class of machine and, in particular, seeks an improvement in the uniformity of grinding along the length of the blade.
  • the depth of metal to be removed from the blade will vary, e.g. from about 0.005 cm, in the case of a blade requiring only minor sharpening, up to about 0.025 cm in the case of a badly deteriorated blade.
  • a skate blade is initially constructed with a convex profile when seen in side view. In the longitudinally central portion of the blade this convexity is comparatively slight. At the ends, the curvatures are sharper, especially at the toe. This profile is designed to maximise the performance of the skate and it is therefore desirable to maintain such profile throughout the life of the blade. Removal of excessive metal from either or both of the toe and heel portions will distort this profile and shorten the life of the skate.
  • the machine herein disclosed comprises means for effecting relative movement of the blade and the wheel in an arc that is curved in the same direction as the profile of the blade edge.
  • the wheel is mounted in a vertical plane at a fixed location in the machine and the skate is mounted blade down in a cradle assembly that is located above the wheel, the central longitudinal plane of the blade being coplanar with the central plane of the wheel.
  • the cradle assembly is pivotable about an axis that extends parallel to the axis of the wheel at an upper location in the machine. Hence both the blade profile and the traversing arc of the blade over the wheel are curved in the same direction, i.e. convexly downwardly.
  • the axis of the pivotted cradle assembly can be located to compensate reasonably well for the comparatively gentle and substantially circular curvature of the central portion of the blade profile. However, it can at the same time compensate only partially for the more sharply curved end portions.
  • the inventive feature of the machine disclosed herein relates to a system for obtaining additional compensation for the "end effect".
  • This result is achieved by increasing the speed of relative movement between the blade and the wheel when grinding the end portions of the blade.
  • the depth of cut taken by the wheel is related not only to the strength of the biassing force and its direction relative to the normal to the blade edge at the point of contact, but also to the length of time that the wheel remains in contact with each part of the blade. In other words, other factors being equal, a grinding wheel that passes quickly over a workpiece will take a shallower cut than one that passes more slowly.
  • This effect is exploited in the present machine by arranging for the relative motion, e.g. travel of the cradle assembly, to be speeded up when the end portions of the blades are in contact with the wheel.
  • the machine comprises means for accurately sensing the location of the point of contact between the wheel and the blade edge and for regulating the relative movement between them to take place at a high speed when this point is at one end, at a series of incrementally reduced speeds as the point travels towards a central portion of the blade and ata low speed as the point moves along this central portion.
  • the speed is then again increased through a series of increments as the contact point travels from the central portion to the other end of the blade.
  • the incremental reductions and subsequent increases in the speed of traverse can be applied to either one or both passes, e.g. an outward pass in which the blade moves overthe wheel from the toe end to the heel end or a return pass when its direction of travel is reversed.
  • FIG. 2 The details of the cradle assembly 10 are shown in Figures 2 and 3.
  • An upper pivot shaft 101 is journalled in brackets 901 fixed to the frame 90.
  • brackets 901 Fixed to the frame 90.
  • arms 103 freely mounted by journals 104 on the shaft 101.
  • the majority of the length of each of the arms 103 is stiffened by a stiffener 105 which is welded at its ends 106 to the respective arm and is connected thereto at the center by a mounting 107.
  • a hydraulic cylinder 108 mounted on the shaft 101 by a journal 109 has a piston 110 that is pivoted at 111 to pairs of transverse links 112 that are pivoted at 113 to the mountings 107.
  • Downward movement of the piston 110 by the cylinder 108 moves the links 112 to the broken line positions shown in Figure 2, drawing the arms 103 inwardly towards each other.
  • the stiffeners 105 the effect of this inward movement is to flex the arms 103 about their unstiffened upper portions 103a and force the lower ends 114 of the arms towards each other.
  • These lower ends 114 carry clamping plates 115 that act to clamp a skate blade between them in a manner and for a purpose that will appear more clearly below.
  • the skate detector 20 The skate detector 20
  • the skate detector 20 is mounted beneath the clamping plates 115, as shown in Figures 2 and 3. Details of the skate detector 20 are better seen from Figures 4a and 4b.
  • This detector consists of a plate 201 having ends bent up to form upstanding skate supports 202 each containing a centrally located, blade centering groove 203. Centrally of the plate 201 there is a body 204 on the upper surface of which there is a magnet 205. A portion 206 of this central body 204 projecting below the plate 201 contains a known type of detecting mechanism 737, e.g. a lamp and photocell device. A pair of pins 208 project upwardly through holes in the plate 201 in alignment with the grooves 203.
  • the pins 208 are mounted on the arms of a U-shaped member 209, the central portion of which is spring urged upwardly and passes through the detecting mechanism 737. As shown by broken lines in Figure 4a, when both the pins 208 are depressed, the central portion of the member 209 moves to a lower position relative to the mechanism 737. The depressed position of the member 209 is thus detected by the mechanism 737.
  • any other convenient detecting mechanism can be used that will confirm that a skate blade is in position between the clamping plates 115, e.g. a pair of spaced apart photosensors that directly sense front and rear parts of the blade without the intermediary of the pins 208 and member 209.
  • the skate detector 20 is located beneath the clamping plates 115 of the cradle assembly 10 in such a manner as to be movable between a raised and a lowered position.
  • it is mounted on an arm 212 that is freely pivoted to the frame at 902. Shown in these views in its lowered position, the detector 20 can be raised by a vertical member 211 secured to it.
  • the member 211 carries a horizontal pin 210 that is controlled by parts of the door moving system 80 in the manner described below.
  • This assembly 30 is secured to the far side of the cradle assembly 10 as seen in Figure 1, for which reason it is largely obscured in that figure. However, a fragment of the frame 301 of the assembly 30 is shown in Figure 2 to make it clear that the assemblies 10 and 30 swing together on the shaft 101.
  • the frame 301 supports a motor 303 that, through a chain 304, drives a threaded shaft 305 mounted in bearings 306 in a central housing.
  • the shaft 305 has two ends that project in respective directions from the bearing housing, these ends being respectively provided with right and left hand threads.
  • the carriages 307, 308 respectively carry laterally projecting arms 309, 310 (see also Figure 9) that extend towards the cradle assembly. On the ends of these arms 309, 310 there are respectively an upwardly projecting toe stop 311 and a downwardly projecting heel stop 312 (also seen in Figure 1).
  • the grinding assembly 40 which is shown in detail in Figures 10, 11 and 12 and in location in the machine in Figure 1, has a fixed housing 401 mounted in the frame 90.
  • the housing 401 pivotally supports a projecting shaft 402 and, as seen in Figures 1 and 10, contains an electromagnetic brake 403 mounted on the inner end of the shaft 402.
  • On its projecting end the shaft 402 is connected to a frame 404 which is thus tiltable with the shaft about its longitudinal axis.
  • the frame 404 supports a motor 405 that drives through a belt 406 to one end of a shaft 407 that is journalled at 408 on the other side of the frame 404.
  • the other end of the shaft 407 supports a grinding wheel 409 that projects through a slot 904 of a frame plate 903 ( Figure 10).
  • a conventional wheel dressing assembly has an arm 410 operated by a crank 411 from an auxiliary motor 413 ( Figure 1) in the housing 401.
  • the arm 410 carries a head 412 for oscillation in an arc across the face of the grinding wheel 409 for cleaning and dressing the same with the desired convex shape. Since this dressing assembly is known, no further details need discussion.
  • the cradle drive mechanism 50 is principally shown in Figure 13 and will be seen to consist of a block 501 that is connected to the cradle assembly 10 at a lower end thereof (see also Figures 1, 2 and 3 for this detail).
  • a cable 502 extends in both directions from the block 501. Starting from the block 501 a part of the cable 502 extends to the left in a generally horizontal direction to pass over a vertical pulley 503 from where it extends downwardly to pass around a further vertical pulley 504, the shaft of which is supported in a journal 505 connected to a bolt 506 that is spring urged downwardly by a spring 507 relative to a fixed stop 910 of the frame 90.
  • the spring 507 thus serves to maintain tension in the cable 502.
  • the cable continues over further vertical pulleys 508, 509 and 510 and over one pulley 511 of pulley block 512. After the pulley 511 it extends to an anchor 911 on the frame. Extending in the other direction from the block 501, the cable 502 passes over a pulley 513 and a second pulley 514 of the block 512 to an anchor 912.
  • the block 512 which mounts the pulleys 511 and 514 is connected to a piston 516 of a cylinder 515 secured to a frame bracket 913 ( Figure 1). With the pulley block 512 in the upper position shown in Figures 1 and 13, the cradle assembly 10 is in its starting position.
  • the cradle assembly 10 is swung to the right in accordance with the operating sequence described below. Reverse travel of the cradle assembly is achieved by retraction of the piston 516 and consequent raising of the pulley block 512.
  • the cradle position detection system 60 shown in Figures 6, 9 and 15 consists of a pair of plates 601, 602 secured to respective carriages 307, 308 of the skate positioning assembly 30 by mountings 605, 606.
  • the plates 601, 602 are each notched to form fingers or flags 603.
  • mounted on the frame at 920 is a bificated post 608 through which the flags 603 of the plates 601, 602 pass when the cradle assembly 10 is swung from its start position of Figures 1, 3 and 9.
  • the post 608 carries a known light and photocell device that detects passage therethrough of each of the edges, leading and trailing, of each of the flags 603. This function is more fully described below in connection with the overall operation of the machine.
  • the control system 70 The control system 70
  • FIG 17 shows the hydraulic circuit of the control system. Fluid is drawn by a pump 701 from a reservoir 702 and supplied under pressure to each of three reversible direction valves 703, 704 and 705 that respectively supply the clamping cylinder 108, a door cylinder 801 and the cradle cylinder 515. In the forward positions of the valves shown, these cylinders are driven in their forward directions. To reverse their movements, the respective valves are moved upwardly to their reverse positions. On the discharge side, each of the valves 703, 704 and 705 passes fluid to a respective bypass valve 706, 707 and 708, whereby such fluid is returned to the reservoir 702. A general pressure release valve 709 maintains the desired pressure on the pressure side of the pump 701.
  • a flow control assembly 710 is connected between the reservoir 702 and the discharge side of the valve 705 controlling the cradle cylinder 515. The function of this assembly 710 is described in more detail below.
  • the control system 70 also includes a number of limit switches, namely a limit switch 730 ( Figure 3) mounted on a frame member 950 for detecting that the cradle assembly 10 is in its start position; a limit switch 731 ( Figures 3 and 16) mounted on a frame member 951 for detecting the condition of the door closing system 80; a limit switch 732 ( Figures 1 and 3) mounted on the frame 90 for determining the pressure in the valve 703 and hence in the cradle cylinder 108; and a limit switch 734 ( Figure 10) mounted in the housing 401 for determining the status of the grinding wheel dressing device.
  • a limit switch 730 Figure 3
  • a limit switch 731 Figures 3 and 16
  • a limit switch 732 Figures 1 and 3
  • a limit switch 734 ( Figure 10) mounted in the housing 401 for determining the status of the grinding wheel dressing device.
  • the door moving system 80 ( Figures 1 and 16), employs a cylinder 801 pivotally mounted on the frame at 930 and having a piston 802 connected to an arm 803 at a pivot 804.
  • the arm 803 is connected to a transverse shaft 805 mounted on the frame at 931.
  • the shaft 805 serves to turn a pair of arms 806, one of which is located on each side of the machine as best seen in Figure 1.
  • Each arm 806 supports at its free end a further arm 807 that has a longitudinal slot 808. This slot engages a pin 809 of a block 810 that is pivotally mounted on a pin 816 secured to an arm 811.
  • the block 810 terminates in a hooked portion 812 and is urged by a spring 815 to engage an upper end 814 of a vertical member 813.
  • the arm 811 supports a door (not shown) that is mounted to slide to open and close an opening 907 at the front of the housing. Behind the opening 907 there is an enclosure 906 (shown partly cut away in Figure 1) designed to protect the hand of a user when he is inserting a skate 8 into the machine.
  • a member 820 (see also Figure 3) that can turn with the arm 811 about a pivoted mounting 932 on the frame.
  • the lower end of the arm 820 is pivotally connected at 822 to a horizontal link 821 that at its far end is pivoted at 823 to a link 824 (see also Figure 2) that in turn is connected to an arm 825 that extends laterally beneath the cradle assembly 10, terminating in a arm 826 that engages the pin 210 of the device 20 for moving it between the lower position shown in Figure 3 and a raised position (not shown) in which it will have been turned somewhat anti-clockwise about the pivot 902 to lie more closely beneath the clamping plates 115 with its magnet 205 parallel to and centred on the gap between the clamping plates 115.
  • the frame 90 is the frame 90
  • Figure 1 also shows a tank 935 at the foot of the frame 90 for containing coolant that is sprayed onto the grinding wheel in a known manner (not otherwise directed or illustrated) and a control panel 936 for operation by the user.
  • the housing will be completed by a door on the near side seen in Figure 1, which door can conveniently serve to support a microcomputer assembly (not shown) that will form part of the control system 70, and may also include a conventional coin operated mechanism (not shown) for energising the machine.
  • the control system turns on the supply of coolant to the wheel and starts to move the cradle assembly 10 by means of the valve 705 and the cradle cylinder 515.
  • the speed of movement of the cylinder 515 and hence the speed of traverse of the cradle assembly 10 is controlled by the flow control assembly 710 in the exhaust flow from the cylinder.
  • the flow control assembly 710 In the preferred form of flow control assembly, there is a series of valve controlled orifices that can be selectively opened or closed to enable the computer to select one of eight different increments of resistance to flow and hence one of eight different traversing speeds for the cradle assembly. Initially, the assembly 710 sets the traversing speed at its minimum value S1.
  • Figure 15 shows the blade 9 and the grinding wheel 409 as seen from the far side of the machine.
  • the broken vertical lines indicate the relationship between points P1 to P18 on the blade 9 and edges E1 to E18 of the flags 603 that trigger signals in the photo sensor in the post 608. It is not necessary that the extreme toe end P1 of the blade 9 be physically aligned in the machine with the edge E1. All that is necessary is that the post 608 be so positioned that, when the centre of the wheel is directly below the point P1, the edge E1 is aligned with the beam in the post 608 to generate an appropriate signal. However, for convenience in the diagram of Figure 15, actual alignment has been shown.
  • the first outward pass P0 with the direction of movement of the cradle assembly from right to left, is shown at the bottom of Figure 15.
  • the machine now repeats the same sequence of steps either once or twice. Once these repeat passes have been made, or if only one double pass was selected (light grind), the computer now stops the grinder motor 405 and allows the cradle cylinder 515 to continue to move the cradle assembly 10 until its attainment of its start position has been confirmed by the limit switch 730. The coolant flow is stopped when the grinding wheel stops.
  • the computer then reverses the clamping cylinder 108 to release the blade 9 from the plates 115 and to enable the operator to remove the sharpened skate.
  • the operation can be so modified that the incremental changes in the traversing speeds from S8 down to S1 and up againt to S7, the example for the outward pass P0 given in Figure 15, is different for the return pass PR.
  • a constant speed can be adopted throughout, or fewer increments can be used, say speed S2 between edges E18 and E11 and between edges E10 and E1 and speed S1 between edges E11 and E10.
  • the return pass can retain the numerous increments of speed, while the outward pass is simplified.
  • the speed or speeds adopted on the return pass will have to be taken into account in selecting the values chosen for the varying speeds on the outward pass, and vice versa.
  • the system is thus especially well adapted to modification to accommodate different blade profiles.

Landscapes

  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (7)

1. Machine d'affûtage du bord inférieur de la lame (9) d'un patin à glace (8), ce bord offrant un profil convexe en vue de côté, comprenant
(a) une meule mince (409) comportant un contour périphérique offrant une section transversale convexe correspondant à une section transversale concave voulue du bord de lame,
(b) des moyens (405-408) permettant d'entraîner la meule en rotation autour de son axe,
(c) des moyens (103, 108, 112, 114) permettant de serrer la lame et
(d) un ensemble-berceau (10) permettant d'effectuer un déplacement relatif entre les moyens de serrage et la meule (409) suivant la direction longitudinale de la lame (9), avec le plan longitudinal médian de cette lame coplanaire au plan médian de la meule et avec cette meule repoussée élastiquement contre le bord de la lame afin d'en retirer une partie taillée,
(e) cet ensemble-berceau (10) comprenant des moyens (101, 103, 104) permettant de faire en sorte que ledit déplacement relatif ait lieu suivant un arc qui offre une courbure suivant la même direction que ledit profil du bord, caractérisée par:
(f) des moyens (60) qui réagissant à la position, le long du bord de la lame, du point de celle-ci au contact de laquelle vient la meule, en accroissant la vitesse de ce déplacement relatif lorsque ce point se trouve au voisinage d'au moins une extrémité (P1, P8) du bord, par rapport à la vitesse au voisinage de la zone centrale (P10­P11) de ce bord dans le sens longitudinal.
2. Machine suivant la revendication 1, dans laquelle ledit déplacement relatif s'effectue suivant un arc de cercle qui coïncide sensiblement avec une zone centrale, dans le sens longitudinal, (P10-P11 ) du profil du bord, des parties extrêmes (P1, P18) de ce profil offrant une courbure plus forte que cette zone centrale, la meule étant repoussée contre le bord de la lame suivant une direction orientée vers le centre de courbure dudit arc de cercle, et les moyens réagissant à la position (60) accroissent la vitesse de déplacement relatif lorsque ledit point se trouve sur l'une et l'autre des zones extrêmes, par rapport à la vitesse lorsque ce point se trouve dans la zone centrale.
3. Machine suivant la revendication 2, caractérisée en ce que les moyens réagissant à la position (60), qui déterminent l'emplacement du point de contact entre la meule et le bord de la lame, assurent une régulation dudit déplacement relatif pour qu'il ait lieu à une vitesse élevée (S8) lorsque ce point se trouve à l'une des extrémités du bord ou aux deux, suivant une série (S7-S2) de vitesses réduites par niveaux étagés lorsque ledit point se déplace en direction d'un zone centrale du bord, et à une vitesse faible (S1) lorsque ce point se déplace le long de la zone centrale.
4. Machine suivant la revendication 3, caractérisée par des moyens (30) de positionnement du patin qui sont montés sur l'ensemble-berceau et comprennent une paire de butées (311, 312) et des moyens (303-310) permettant de déplacer ces butées l'une vers l'autre de façon à centrer un patin dans le sens longitudinal par rapport aux moyens de serrage, ces moyens (30) de positionnement du patin comportant une paire d'éléments en forme de volet (601, 602) montés de façon à se déplacer avec l'une, associée, des butées, chaque élément en forme de volet comportant plusieurs doigts (603), des moyens détecteurs (608) étant montés en un emplacement fixe dans la machine afin de coopérer avec ces doigts pour produire une série de signaux correspondant à une série de positions longitudinales (P1, P18) du point de contact entre la meule et le bord de la lame, et l'ensemble-berceau (10) étant relié à ces moyens détecteurs de façon que chacun des signaux de ladite série commande une réduction étagée, ou une augmentation étagée, de la vitesse (S1-S8) du mouvement de pivotement.
5. Machine suivant la revendication 4, caractérisée par des moyens manoeuvrables à la main et permettant de commander l'ensemble-berceau lorsque la lame est celle d'un patin de figures offrant des pics sur sa partie de pointe, ce qui permet de mettre hors service les moyens d'entraînement en rotation de la meule lorsque le point de contact entre cette meule et le bord de la lame se trouve dans la zone de ces pics.
6. Machine suivant l'une quelconque des revendications 1 à 5, caractérisée par:
(g) un détecteur de patin (20) et des moyens (212) montant ce détecteur de patin de façon mobile entre une position de retrait et une position active dans laquelle il est situé à proximité immédiate au-dessous des moyens de serrage lorsque l'ensemble-berceau se trouve dans sa position de départ, de façon à détecter ainsi une lame de patin mise en place par un utilisateur de façon à faire saillie vers le bas à partir des moyens de serrage lors-qu'ils sont dans leur position ouverte, et
(h) des moyens (30) de positionnement du patin qui sont montés sur l'ensemble-berceau et comprennent une paire de butées (311, 312) et des moyens (303-310) permettant de déplacer ces butées l'une vers l'autre de façon à centrer un patin dans le sens longitudinal par rapport aux moyens de serrage.
7. Machine suivant la revendication 6, caractérisée en ce que la meule (409) est montée dans un plan vertical et en un emplacement fixe dans la machine et l'ensemble-berceau (10) assure le montage des moyens de serrage au-dessus de la meule, cet ensemble-berceau (10) étant monté de façon pivotante autour d'un axe horizontal (101) parallèle à l'axe de la meule en un emplacement situé au-dessus des moyens de serrage, ces moyens de serrage comprenant une paire de plaques de serrage (115) et de moyens (103, 108, 112, 114) permettant de rapprocher et éloigner ces plaques en synchronisme entre lesdites positions ouverte et fermée, en permettant, dans la position fermée, de serrer la lame avec son plan longitudinal médian coplanaire au plan médian de la meule quelle que soit l'épaisseur transversale de la lame.
EP19840105970 1983-06-10 1984-05-25 Machine pour aiguiser les lames de patins à glace Expired EP0128430B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105970T ATE36461T1 (de) 1983-06-10 1984-05-25 Vorrichtung zum schaerfen von schlittschuhlaufeisen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA430108 1983-06-10
CA000430108A CA1210935A (fr) 1983-06-10 1983-06-10 Affuteuse de patins
CA000430117A CA1208023A (fr) 1983-06-10 1983-06-10 Affuteuse de patins
CA430117 1983-06-10

Publications (3)

Publication Number Publication Date
EP0128430A2 EP0128430A2 (fr) 1984-12-19
EP0128430A3 EP0128430A3 (en) 1985-12-27
EP0128430B1 true EP0128430B1 (fr) 1988-08-17

Family

ID=25670057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840105970 Expired EP0128430B1 (fr) 1983-06-10 1984-05-25 Machine pour aiguiser les lames de patins à glace

Country Status (2)

Country Link
EP (1) EP0128430B1 (fr)
DE (1) DE3473409D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021050349A1 (fr) * 2019-09-11 2021-03-18 Prosharp Inc. Porte-lame automatique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE460827B (sv) * 1987-07-17 1989-11-27 Svenska Skatebox Ab Skridskoslipningsautomat
US11806826B2 (en) 2019-09-11 2023-11-07 Prosharp Inc. Automatic blade holder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851002C (de) * 1951-06-23 1952-09-29 Hudora Werk Hugo Dornseif Vorrichtung zum Schleifen der Laufflaechen von Schlittschuhen
US3789551A (en) * 1972-02-28 1974-02-05 Custom Radius Corp Skate sharpening devices
US4078337A (en) * 1977-01-10 1978-03-14 Chiasson Robert H Apparatus for sharpening ice skate blades and the like
US4294043A (en) * 1978-01-16 1981-10-13 Glenn Sakcriska Ice skate sharpener

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021050349A1 (fr) * 2019-09-11 2021-03-18 Prosharp Inc. Porte-lame automatique
WO2021050351A1 (fr) * 2019-09-11 2021-03-18 Prosharp Inc, Porte-lame automatique

Also Published As

Publication number Publication date
DE3473409D1 (en) 1988-09-22
EP0128430A2 (fr) 1984-12-19
EP0128430A3 (en) 1985-12-27

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